等色点光度法测定指示剂类有机试剂的纯度  

Spectrophotometric Determination of the Purity of Organic Indicators With Isosbestic Points

作　　者：梁维安[1] 秦美芹[1] 张震宇[1] 邹时复[1] 

机构地区：[1]山东大学化学系,济南250100

出　　处：《分析化学》1999年第5期589-592,共4页Chinese Journal of Analytical Chemistry

摘　　要：等摩尔连续变化法中部分吸收光谱(C_R>nC_M)相交形成一个等色点,另一部分光谱(C_R<nC_M)则不交于该等色点。我们利用等色点吸光度值与另一部分光谱在该波长吸光度值之比,可计算出试剂纯度。方法不依金属为基准,操作简单,结果可靠。There is an isosbestic point in some absorption spectra ( CR > nCM) of the job method and other spectra ( CR < nCM ) don't interset at the isosbestic point, when a MR complex is formed. The purity of organic indicator(R) can be calculated from ratio of absorbance of isosbestic point to that of the other spectra at this wavelength. Proposed method is simple and independent of the metal ions. Results obtained are satisfactory.

关 键 词：等色点 光度法 有机试剂 指示剂 纯度 测定 

分 类 号：O657.303[理学—分析化学]